diff --git a/backend/webdav/webdav.go b/backend/webdav/webdav.go
index 10ed2e29d..6f1238e3b 100644
--- a/backend/webdav/webdav.go
+++ b/backend/webdav/webdav.go
@@ -1128,6 +1128,7 @@ func (o *Object) Storable() bool {
 // Open an object for read
 func (o *Object) Open(ctx context.Context, options ...fs.OpenOption) (in io.ReadCloser, err error) {
 	var resp *http.Response
+	fs.FixRangeOption(options, o.size)
 	opts := rest.Opts{
 		Method:  "GET",
 		Path:    o.filePath(),